I think the problem is just mis-understanding what they said, personally. The things they listed appear to be values tied to a random number (3% of the time in this situation, the ball carrier fumbles...players progress up to 7% in this area or that area...etc, etc). Pursuit angles, logic, etc is based FAR less on random numbers, and much more on actual programming. Hence you can see some things updated with tuners (where they just set parameters for the random number generation), and other things that need a patch (actual code changes). This is my assumption, but I'm pretty sure I'm right.